Patent GB-280994-A (GB)
Title: Improvements in or relating to mechanism for shaping the ends of shoe uppers
IPC: A43D21/12
Filed: 1926-08-18
Abstract: 280,994. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). Aug. 18, 1926. Uppers, machines for.-Relates to machines for marginally flanging the heel end of a shoe upper off the last by moulding it on a form movable between upper-receiving and flange-forming positions, and consists in detail improvements. An upper-positioning device is provided in the receiving position, which engages jig-holes in the heel end of the upper, does not mask the remainder of the insole, and, also, clamps the inturned flange of the counter to the heel end of the insole. A clamping device is movable into ,engagement with the counter flange when the form is in the operating position, which device also engages the insole. Means for tensioning the upper about the form move lengthwise of the form to pull the upper, moving first to a variable extent depending on the resistance of the upper and then through a fixed extent to give a positive further pull. The form is automatically moved towards wipers during their operative stroke, and away from them prior to their withdrawal. The counter clamping device moves inwardly over the form in response to the pressure of the wipers, and acts as a retarder to the edge of the upper. The invention is described as applied to the machine of the kind described in Specification 206,175. The form 12 is provided with jig pins 14 for the insole. The upper is placed about the form and a treadle 72 depressed to lower an arm 46 carrying a spring plunger 54, Fig. 5, normally depressing a presser foot 56 adapted to engage the counter flange. Jig pins 62 are carried by an arm 60 linked to the casing of the spring plunger, the arrangement being that on the foot 56 engaging the counter flange, further descent of the arm 46 swings the pins through holes in the foot so that the operator may correctly position the upper, which is provided with holes corresponding to the pins. A member 144, Fig. 8, is then inserted within the previously moulded toe end, a spring 148 imparting a variable pull to tension the heel end of the upper about the form. Movement of a handle 154 through 180 degrees imparts a further pull of definite extent to the upper through the medium of pawls 160. This mechanism may be swung about a pivot 134 to one side or the other according to whether a right or left shoe is to be operated on, and is secured in position by a latch 172. The upper being thus positioned a treadle 26, Fig. 1, is then depressed to start the machine. The preliminary movement of this treadle releases a latch allowing the arm 46 to rise to move the upper positioning mechanism out of the way. Alternatively, this latch may be freed by a knee lever 130. On the cam shaft 24 commencing to turn a link 30 swings the form about its pivot 22 to operating position, where it is held by latches 34. An arm then descends to clamp the work to the upper face of the form. This arm carries insole engaging members 180, Fig. 8, and a counter flange engaging member 184 mounted on a slide 182. A heel band 16, Fig. 6, is then closed about the rear part of the upper. This band is carried by side members 244, an end block 242, and four ties 246, and is closed about the shoe by a sliding cross head 250 acting on the end block 242 through a spring, on the rear corners of the band by yielding links, and on the side blocks by links 254 and yielding toggles 256. The wipers 18, Fig. 1, then advance to wipe the margin of the upper inwardly over the flange of the counter, the clamping member 184 yielding as the wipers advance and. acting as a retarder. Near the end of this movement a toggle 220 is straightened to increase the moulding pressure of the wipers on the upper. Tacks are driven' by mechanism (not shown) of the kind described in Specification 206,437, and the automatically operated parts of the machine automatically return to starting position. Specification 206,176, also, is referred to.